Adrenaline Posted February 3, 2019 Share Posted February 3, 2019 So I read on here and see it takes much more silhouette to make major in 9mm that what it takes me. I get 171 pf with 7.0gr silhouette 124 gr Everglades FM. Col is 1.1540. Kkm barrel in Open glock17. Any thoughts?? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted February 3, 2019 Share Posted February 3, 2019 Every barrel is different. Count yourself lucky that you have a fast barrel ... Your OAl OF 1.154" MIGHT also be part of it - usually loaded to 1.165" or so. Link to comment Share on other sites More sharing options...
chevrofreak Posted February 3, 2019 Share Posted February 3, 2019 You either have a fast barrel or a fast batch. What other loads do you use? Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted February 3, 2019 Share Posted February 3, 2019 You might want to run them again thru the chrono and see if it's still that fast. Link to comment Share on other sites More sharing options...
Adrenaline Posted February 3, 2019 Author Share Posted February 3, 2019 It's a very accurate barrel for sure. Off hand at 25 yrds easily 1 in groups. I ran them through 2 different chronos same day and again yesterday. 7.0 gr 1356 fps low 1382 low. 168/171 pf. Loaded some more today at 7.0 and 7.1 and will confirm for the 3rd time. I wanna make sure I'm hitting my pf. Link to comment Share on other sites More sharing options...
zzt Posted February 3, 2019 Share Posted February 3, 2019 A, you are okay where you are, but you may be pushing your luck. I used to say that as long as the slowest load in a ten or 20 shot string made major you were good to go. One of my favorite Silhouette loads had an SD of 7.84. The slowest round was 167 PF; average was 168. Then a friend got bumped to minor at a match, because his load tested 164 PF. He had passed chrono at several other matches with the same load, so he was pissed. The way you chrono affects the outcome. The best (fastest) reading it when the bullet travels down the centerline of the chrono and parallel to the sensor ports. The chronos at Level II and III matches are set up at the specified 10' . The RO aims at the same spot (or as close as he can) all the time. With an Open gun where the dot is 2: above the bore, aiming at the 'same' spot means the bullet is traveling along a path not quite parallel to the ports. So the reading is a little lower than the actual velocity. So for a long time I've shot for 172 PF. That gives me a large margin for error. At the last Level III, that is exactly what the chrono'd. However, you can't count on that. Next match may be 171, or 170, or 173. I don't care. I have enough leeway that I'll never get bumped to minor. BTW, the gun runs better at 172. Link to comment Share on other sites More sharing options...
Adrenaline Posted February 4, 2019 Author Share Posted February 4, 2019 I agree.. I'll work up to 7.2 Link to comment Share on other sites More sharing options...
MrPan Posted February 27, 2019 Share Posted February 27, 2019 Using 124 Everglades jhp at 1.169 oal with 7.7 gn out of my atlas chaos. Shoots very flat and soft will chrono and post numbers Link to comment Share on other sites More sharing options...
Hi-Power Jack Posted February 27, 2019 Share Posted February 27, 2019 On 2/3/2019 at 4:24 PM, Adrenaline said: It's a very accurate barrel. Off hand at 25 yrds easily 1" groups. WOW. I missed this before. That is almost unbelievable shooting - doubt many people can duplicate that feat. But, I bet I can easily triple that group size Link to comment Share on other sites More sharing options...
zzt Posted February 27, 2019 Share Posted February 27, 2019 (edited) Jack, you really have to go to more bullseye matches. It is not that uncommon, AND they do it one handed. Wish I could do it. I'm good two handed, but not one. Edited February 27, 2019 by zzt Link to comment Share on other sites More sharing options...
Aircooled6racer Posted February 28, 2019 Share Posted February 28, 2019 Hello: A thing to remember with Silhouette is that it is reverse temp sensitive. So the hotter outside it gets the slower the bullet goes. I saw some guys at nationals years ago go minor in the hot Vegas sun but they chronoed major at home at 70 degrees. Thanks, Eric Link to comment Share on other sites More sharing options...
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